Yoshitake SCV-4 Bedienungsanleitung

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EPDT-309a

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MODEL SCV-4/SCV-4EN

CHECK VALVE

PRODUCT MANUAL

Thank you very much for choosing the Yoshitake’s product. To ensure the correct and safe use of the

product, please read this manual before use. This manual shall be kept with care for future references.

The symbols used in this manual have the following meanings.

Warning

This symbol indicates a potentially hazardous situation that, if not avoided,

could result in death or serious injury.

Caution

This symbol indicates a hazardous situation that, if not avoided, may result in

minor or moderate injury or may result in only property damage.

Table of Contents

1. Specifications································································ 1

2. Dimensions and Weights ···············································2-3

3. Pressure loss ······························································· 4

4. Installation ··································································· 5

4.1 Precaution for installation··········································· 5

5. Operation procedure······················································· 5

5.1 Precaution for operation············································· 5

6. Maintenance ································································· 6

6.1 Troubleshooting······················································· 6

6.2 Warning for maintenance··········································· 6

Warranty Information

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EPDT-309a

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1. Specifications

Model SCV-4 SCV-4EN

Nominal size 15-50A 15-250A

Application Steam, Air, Cold and hot water, Oil, non-hazardous fluid

Maximum pressure 1.6 MPa

(※1)

Maximum temperature 200°C

(※1)

300°C

(※1)

Installation posture Horizontal and Vertical

(※2)

Connection JIS Rc/NPT BS PN16

Minimum valve opening

pressure 0.05 MPa

Body EN-GJL-250 JL1040 (Equal with JIS FC250)

Disc X20Cr13 1.4021 (Equal with JIS SUS420J1)

※1 Maximumpressure and temperatureareshownin the following table.

Temperature [°C]

-10～120

150 180 200 250 300

SCV-4 1.6 MPa

1.4 MPa

1.3 MPa

1.2 MPa

SCV-4EN 1.6 MPa

1.4 MPa

1.3 MPa

1.2 MPa

1.1 MPa

0.9 Mpa

※2 When installing the product on vertical posture, please make the fluid flow from the ground up (see

thefollowingfigure).

* The product cannot be disassembled.

* Since a small amount of fluid leaks out of the product, it cannot be used for applications requiring

complete closing.

* Consider usage condition (usage frequency and durability) when you select the product.

Caution

Please confirm that the indications on the product correspond with the specifications

of the ordered product model before use.

* Do not use the product and contact us for further information.

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EPDT-309a

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2. Dimensions and Weights

SCV-4

(mm)

Nominal

size d H LD A Weight

(kg)

15A Rc 1/2 NPT 1/2

56 90 15 41 0.7

20A Rc 3/4 NPT 3/4

56 100 20 41 0.9

25A Rc 1 NPT 1 82 120 25 50 1.2

32A Rc 1 1/4

NPT 1 1/4

99 140 32 60 1.7

40A Rc 1 1/2

NPT 1 1/2

112 170 40 68 2.2

50A Rc 2 NPT 2 121 200 50 84 3.6

Fig.1 Structure, dimensions and weights of SCV-4

No.

Part name

1 Body

2 Valve seat

3 Bonnet

4 Stem

5 Spring

6 Valve

7 Gasket

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EPDT-309a

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SCV-4EN

Fig.2 Structure, dimensions and weights of SCV-4EN

No.

Part name

1 Body

2 Valve seat

3 Bonnet

4 Stem

5 Spring

6 Valve

7 Hexagon bolt

8 Gasket

(mm)

ominal

size d H L Flange BSEN PN16 Weight

(kg)

D C G n-h

15A 15 56 130 95 65 46 4-14 2.1

20A 20 56 150 105 75 56 4-14 2.7

25A 25 67 160 115 85 65 4-14 3.8

32A 32 76 180 140 100 76 4-19 5.5

40A 40 89 200 150 110 84 4-19 7.4

50A 50 96 230 165 125 99 4-19 9.5

65A 65 104 290 185 145 118 4-19 15.0

80A 80 124 310 200 160 132 8-19 20.0

100A 100 161 350 220 180 156 8-19 29.0

125A 125 174 400 250 210 184 8-19 41.0

150A 150 197 480 285 240 211 8-23 66.0

200A 200 248 600 340 295 266 12-23

111

250A 250 295 730 405 355 319 12-28

196

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EPDT-309a

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. Pressure loss

The values listed on the chart below are reference values. It varies depend on the piping conditions and

usage environment. Use a safety factor more than 20% for product selection.

Fluid: water

Fig. 3 Pressure loss chart

ΔP: Pressure loss [MPa]

V: Flow rate [m3/hour]

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EPDT-309a

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4. Installation

4.1 Precaution for installation

Caution

1. When installing the product to the piping, make sure that the tip of the thread does not interfere with the

bulkhead of the valve or apply excessive torque which will damage the valve.

2. Impact by rapid pressure change, such as water hammer, breaks the product or parts.

3. When the product is in a sealed piping state, the fluid temperature rising and expansion leads to

malfunction of the product

4. Keeping fluid in the product for a long term fixes sliding parts and leads to malfunction of the product.

5. Fluid with viscosity fixes the parts and leads to malfunction of the product.

6. Secure enough space needed for maintenance, inspection and repair of the product.

7. Do not apply excessive load, torque or vibration to the product.

8. Before installing the product, be sure to remove foreign substances and scale from the piping, and

prevent seal materials to be used for piping connection, such as seal tape or liquid seal agent, from

flowing into the inside of piping. Commingling of foreign substances such as scale or seal material leads

to malfunction of the product.

9. Do not make dissimilar metal piping which causes difference of electrical potential. If doing so, the

product and parts are corroded.

10. Consider usage condition (usage frequency or durability) when selection.

11. When installation, check the direction of the product so that the fluid flowing and the arrow marked on

the product are in the same direction.

* Wrong direction prevents fluid from flowing.

12. The majority of product failures are happened due to scales such as sands and dust in the pipeline.

Please pay attention to the dust inside the pipeline.

5. Operating procedure

5.1 Precaution for operation

Caution

1. Before flowing the fluid, make sure that there is no danger when the fluid flows to the end of piping.

Also make sure that the connection is securely connected and there is no slack in the piping

connection.

* If tightening is not secured, the fluid may blow out. If the fluid in high temperature, it can result in

burns.

2. Keep the product warm and drainage the water to prevent from freezing.

3. In case of high temperature fluid, please do not touch the product directly with hands.

* There is a risk of burn.

4. Perform daily inspections and periodical inspections to maintain the product functions.

* If there is any abnormalities, ask specialized dealer for the treatment.

5. After a long term of out of service, perform operation check before re-operate the product.

* If there is any abnormalities, ask specialized dealer for the treatment.

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EPDT-309a

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6. Maintenance

6.1 Troubleshooting

Trouble Cause Remedy

Fluid does not flow.

Contact surface of

valve

[

] and

valve seat [2] is stuck.

Repla

ce the product if

valve

[

] does not

move.

Installation direction is wrong.

onfirm the arrow on the product and

install it correctly.

Fluid flows back.

Cont

act surface of

valve

[

] and

valve seat [2] is worn away.

Replace the product.

Internal parts are damaged.

Replace the product.

6.2 Warning for maintenance

Warning

1. Completely discharge the pressure inside of the product, line and equipment before disassembling or

maintenance. In the case of high-temperature fluid, cool down the product till it can be touched with bare

hands.

* Failure to follow this notice may result in injury or burns.

2. Ask professional or experienced company to do the inspection.

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